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  • Title: Photophysical processes of some benzimidazole derivatives.
    Author: Chen Z, Zhang C, Feng L.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2005 Nov; 62(1-3):592-5. PubMed ID: 16257763.
    Abstract:
    The photophysical properties of N-(alpha-naphthyl)-benzimidazole (alpha-NABI), N-(beta-naphthyl)-benzimidazole (beta-NABI) and N-(alpha-pyridyl)-benzimidazole (alpha-PYBI) were studied and alpha-NYBI exhibit intramolecular charge transfer fluorescence in polar solvents. The fluorescence of benzimidazoles can be quenched by acetic acid and the existence of exciplexes was observed between the benzimidazole derivatives and acetic acid. Particularly, the maximum emission peak of solution of alpha-PYBI in mixed solvent, ether and acetic acid, presents obvious red-shift with the increase of concentration of acetic acid in the mixed solvent.
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